/*
 * SPDX-License-Identifier: Apache-2.0
 *
 * The OpenSearch Contributors require contributions made to
 * this file be licensed under the Apache-2.0 license or a
 * compatible open source license.
 */

/*
 * Licensed to Elasticsearch under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright
 * ownership. Elasticsearch licenses this file to you under
 * the Apache License, Version 2.0 (the "License"); you may
 * not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

/*
 * Modifications Copyright OpenSearch Contributors. See
 * GitHub history for details.
 */

package org.opensearch.common.recycler;

/**
 * No value recycler
 *
 * @opensearch.internal
 */
public class NoneRecycler<T> extends AbstractRecycler<T> {

    public NoneRecycler(C<T> c) {
        super(c);
    }

    @Override
    public V<T> obtain() {
        return new NV<>(c.newInstance());
    }

    /**
     * Generic no value recycler
     *
     * @opensearch.internal
     */
    public static class NV<T> implements Recycler.V<T> {

        T value;

        NV(T value) {
            this.value = value;
        }

        @Override
        public T v() {
            return value;
        }

        @Override
        public boolean isRecycled() {
            return false;
        }

        @Override
        public void close() {
            if (value == null) {
                throw new IllegalStateException("recycler entry already released...");
            }
            value = null;
        }
    }
}
